package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constants.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemPostService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import io.netty.handler.codec.AsciiHeadersEncoder;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {


    @Autowired
    private RedisTemplate<String, Object> redisTemplate;
    @Autowired
    private SystemUserService systemUserService;

    @Override
    public CaptchaVo getCaptcha() {
        //1.生成验证码图片及验证码
        //参数:长,宽 字符个数
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        specCaptcha.setCharType(SpecCaptcha.TYPE_DEFAULT);
        //2.把验证码存到redis中
        String code = specCaptcha.text().toLowerCase();
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString();
        redisTemplate.opsForValue().set(key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //3将图片和key 存到vo 返回
        //图片本身是字节文件 用(base64)转换成字符串文件
        String image = specCaptcha.toBase64();
        CaptchaVo captchaVo = new CaptchaVo(image, key);
        return captchaVo;
    }

    @Override
    public String login(LoginVo loginVo) {
        //1.检验接收的验证码是否为null,不为null继续
        if (ObjectUtils.isEmpty(loginVo.getCaptchaCode())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //2.检验收到的验证码是否过期
        String redisCode = (String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (ObjectUtils.isEmpty(redisCode)) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //3.检验验证码是否正确
        if (!redisCode.equalsIgnoreCase(loginVo.getCaptchaCode())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //4.检验账号是否存在不为null继续
        LambdaQueryWrapper<SystemUser> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(SystemUser::getUsername, loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(lambdaQueryWrapper);
        if (systemUser == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);

        }
        //5.对比密码(加密)

        if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))) {
                throw  new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //6.检查账号是否可用
        if (systemUser.getStatus()== BaseStatus.DISABLE){
                    throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //7.返回token
        String token = JwtUtil.createToken(systemUser.getId(), systemUser.getName());
        return token;
    }
}
